package com.lsl.test;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;


/**
 * @author lishuailong
 * @create 2020-07-08 16:59
 */
public class test1 {
    public static void main(String[] args) {

        ArrayList arrayList = new ArrayList();
        arrayList.add("2");
        LinkedList linkedList = new LinkedList();
        linkedList.add("1");

        HashSet set = new HashSet();
        String s="1";
        String s1="1";
        System.out.println(s.hashCode());
        System.out.println(s1.hashCode());
        set.add("1");
        set.add(s);
        set.remove(1);
        System.out.println(set.size());

        HashMap map = new HashMap();
        map.put("1","1");

        System.out.println(12&1);


    }
}

interface A{
    void show();
}
interface B extends A{
    @Override
    void show();
}
